Hello,
include "asm.inc"
window 800,600,1
sys s=260
single x, y, c, d
while key(27)=0
cls 0,0,0
for i=1 to 800
for j=1 to 600
x=i*s/600
y=j*s/600
c= x*x+y*y
d=c/2
if d-round(d) <0.11 then
color 255,255,255
setpixel i+1,j+1
end if
next
next
waitmouse
s=rand(15,260)
wend
winEnd
.